Gas turbine plant



Filed May 4, 1942 HL .1 1/ J ATT EYS Patented Feb. 8, i944 f UNITED STATES FATE Gas ru i ltm rmm' I Walter Traupel, Wintcrthur, Switzerland, as-

signor to Sulser Freres, Sooiete Anonyme, Winterthur, Switzerland vention is Application May 4, 1942, Sean's; 441,599 In Switzerland October 11, 1941 tonn s. (coco-41') The invention relates to a gas turbine plant. in which the working medium is compressed, then heated, and-afterwards expanded inat least one turbine developing the useful work, whereby a part of thi working medium flows in a closed circuit, wh t another part is taken from the closed circuit and instead of it a replace part is through the-nest thus becoming cooled; it is then led into the exhaust gaslturbine I where thegasesofcombustion are expandedr introduced, and whereby the part taken from the closed circuit is further used as combustion air in heating the working medium flowing in the closed circuit. The invention consists in that the charging compressor, which works without inter-.

mediate cooling, delivers fresh air direct into the preheater oi' the plant. The exhaust gases from the air heater are thereby preferably passed into the exhaust gas turbine without the intermediate arrangement of a further heat exchanger. The fresh air can be'introduced into the heat exchanger at that part where the air flowing on the low-pressure side of the heat exchanger has at least approximately the same temperature as the fresh air.

The purpose of the invention is to obtain by means of a simple arrangement, a plant with an overall high emciency.

.1 pressure and low pressure turbines, means for passing the compressed gas fromthe compressor means to the preheater and .theninto'the c'om-- The method or working time plant is a new known, The balance of output'at. the charging s'et ll, l5, cansof course also be obtained by other means. than by' the electric generator H v shown inthe drawing, a

I claim:

l. A gas turbine plant which comprises compressor means for compressing'a working'gas, a

*Iareheater, a combustion heater, fuel supply means for the combustion heater, series connected highbustion heater, a conduit fortpassing ,the com- One example of execution according to the incrime of the charging set.

The turboblower l5 compresses the working medium which is drawn in through the pipe 8|. The com ressed air then'flows-from the turboshown diagrammatically in the draw-;

3B shows the place at which the fresh blower I! to the place 3!. a sultable'place in the preheater and then through the pipe. The air is cooled in the recooler II and enters the main compressor I and I. an intermediate oler I being fitted between the two parts of the main "compressor I and I. ,The compressed air is led throu h the preheater [and then further heated in the air heater 0. f

In the high-pressure turbine I the first part of the expansion takes place. in the low-pressure turbine 9 a further part of the expansion. After hi the low pressure turbine through the pre passing throu h the low-pressure turbine 9, a

part of the air is led into the preheater B through the pipes 3!, 32. The other part flows through the pipe 38 into the heater 8 into which fuel is pressed gas after being heated in the combustion heater through thehigh pressure and low pre's-i sure turbines in series, means for passing a part of the; expanded gas irom the low pressure turbine to the combustion heater to bum .the fuel,

a turboblower, an exhaust-gas; turbine arranged to drive the turboblower, means for passing air compressed by the turboblower to an intermediate part or the preheater, a conduit for passing the =,combustion gas from the combustion heater-d1 *rectly through the exhaust ,gas turbine, and a cdnduit for passing the other part of; the gas expanded in the low pressure turbine through the preheater to preheat the compressed gas an then back into the compressor means. 7 h

2. A gas turbine plant which comprises a compressor for compressing a working 8 a pre-' heater for passing, the compressed gas there- 'through, a combustion heater provided with fuel supply means, a high pressure turbine, a low pres sure turbine, a conduit for'passlngethe. compressed' gas from the preheater through the combustion heater and the two turbines inseries,

a conduit fo'r passing a part of the gas exended in the low pressure turbine to the combu'stion heater to burn the fuel, an exhaust gas turbine. a conduit for passing the combustion ga directly from the combustion heater'through the I exhaust gas turbine to the atmosphere, a conduitfor passing a part of the gasexpanded heater and back to the compressor, a turboblower driven by'th'e exhaust gas turbine, conduit means for drawing air from thelatmosphere" into the turboblower and passing the compressed air into the preheater at an intermediate point to intermingle with the gas from'thelow pres-- injected through the pipe 84. The hot comhustion gas thereby produced heats the air flowing sure turbine and then pass into the compressor,

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